08-04-2011
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Dear All,
I am trying to write an script to calculate geometric centre of selected residues of a protein structure. Say I have a PDB file (a text containing the x, y, and z coordinates of atoms of a protein). I want to extract the X coordinates of the atoms belonging to the interested residues... (2 Replies)
Discussion started by: siavoush
2 Replies
2. Shell Programming and Scripting
hello all how can i get the type of variable in perl like
typeof(var); in javascript for instance ? to know if the variable is int or string ? (2 Replies)
Discussion started by: umen
2 Replies
3. Shell Programming and Scripting
Can one string type variable changed into the date type variable. (1 Reply)
Discussion started by: rinku
1 Replies
4. Shell Programming and Scripting
Hello:
Is there any way to tell the type of a passed or entered variable, if it is a string or integer,...etc.
Thanks a lot (2 Replies)
Discussion started by: aladdin
2 Replies
5. Programming
Dear colleagues,
One of my friend have a problem with c code. While compiling a c program it displays a message like
"array type has incomplete element type". Any body can provide a solution for it.
Jaganadh.G (1 Reply)
Discussion started by: jaganadh
1 Replies
6. Programming
The following program takes two command line arguments.
I want the second argument (fileCount) to be stored/printed as a int value. I tried my best to typecast the char to int (check the printf statement at last) but is not working...the output is some junk value.
This program is in its... (3 Replies)
Discussion started by: frozensmilz
3 Replies
7. Shell Programming and Scripting
Hello experts,
How we can find out,that what is type of a scalar variable? i.e a scalar var contain a number or a string.
Thanks in advance. (8 Replies)
Discussion started by: Zaxon
8 Replies
8. Programming
Is it permitted to type-cast a member variable passed in as a parameter in a member const method ..
I am doing something like :
in a
return-type method () const {
variable other = long(member variable)
}
this other assigned variable is not updating and I wonder if type-casting in such... (1 Reply)
Discussion started by: shriyer123
1 Replies
9. Programming
I am confused by the value of "currdisk->currangle" after adding operation. Initially the value of "currdisk->currangle" is 0.77500000000000013, but after adding operation, it's changed to "-nan(0x8000000000000)", Can anyone explain ? Thanks! The following is the occasion of gdb debugging.
3338 ... (8 Replies)
Discussion started by: 915086731
8 Replies
su(1) General Commands Manual su(1)
Name
su - substitute a user ID
Syntax
su [username]
su - [username]
su -f [username]
Description
The command requests the password of the specified username. If the correct password is given, changes to that username without changing
the current directory. The user environment is unchanged except for HOME and SHELL which are taken from the password file entry for user-
name. The shell that is run is also taken from the password file entry for username. The new user ID stays in force until the shell
exits.
If no username is specified, `root' is assumed. To remind the superuser of his responsibilities, the shell substitutes `#' for its usual
prompt.
Options
-f Prevents from executing the .cshrc file, making start up faster.
- Simulates a full login.
Diagnostics
Sorry
An invalid password was supplied for the specified username.
Unknown login: username
The specified username was not found in the passwd database.
No directory
The home directory for the username is not accessible at this time (only with ``-'' argument).
No shell
The shell specified in the passwd database entry for username could not be executed.
Kerberos initialization failure
Consult your system administrator.
If enhanced security features are enabled the following error messages are also possible:
Requires secure terminal
Attempt to su to UID 0 on a line that is not marked secure in
User's password has expired
Access is denied because the password for username is expired.
This account is disabled
Access is denied because the auth entry corresponding to username is marked disabled.
Files
Log file of anyone who became
root, with a date mark.
See Also
csh(1), sh(1), passwd(5yp), environ(7), edauth(8)
Security Guide for Administrators
Security Guide for Users
su(1)